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Resolve #4

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arnaucube
2020-03-03 16:31:09 +01:00
parent 17bad75853
commit 83f87bfa46
3 changed files with 38 additions and 11 deletions
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31
utils/utils.go
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@@ -6,6 +6,9 @@ import (
"fmt"
"math/big"
"strings"
"github.com/iden3/go-iden3-crypto/constants"
"github.com/iden3/go-iden3-crypto/ff"
)
// NewIntFromString creates a new big.Int from a decimal integer encoded as a
@@ -87,20 +90,36 @@ func HexDecodeInto(dst []byte, h []byte) error {
return nil
}
// CheckBigIntInField checks if given big.Int fits in a Field Q element
func CheckBigIntInField(a *big.Int, q *big.Int) bool {
if a.Cmp(q) != -1 {
// CheckBigIntInField checks if given *big.Int fits in a Field Q element
func CheckBigIntInField(a *big.Int) bool {
if a.Cmp(constants.Q) != -1 {
return false
}
return true
}
// CheckBigIntArrayInField checks if given big.Int fits in a Field Q element
func CheckBigIntArrayInField(arr []*big.Int, q *big.Int) bool {
// CheckBigIntArrayInField checks if given *big.Int fits in a Field Q element
func CheckBigIntArrayInField(arr []*big.Int) bool {
for _, a := range arr {
if !CheckBigIntInField(a, q) {
if !CheckBigIntInField(a) {
return false
}
}
return true
}
// CheckElementArrayInField checks if given *ff.Element fits in a Field Q element
func CheckElementArrayInField(arr []*ff.Element) bool {
for _, aE := range arr {
a := big.NewInt(0)
aE.ToBigIntRegular(a)
if !CheckBigIntInField(a) {
return false
}
}
return true
}
func NewElement() *ff.Element {
return &ff.Element{0, 0, 0, 0}
}